What Is the Function of the Renal Cortex?
After the frontal section of the kidney, the dark part of the outer layer is called the renal cortex. The cortex surrounds the medulla and is rich in blood vessels. It is granular in appearance and is mainly composed of renal corpuscles and tubules. The cortex has a renal column that extends to the medulla, and the base of the vertebral body of the medulla is facing the cortex. The entire renal parenchyma is composed of many renal tubules, blood vessels, and connective tissue. The renal cortex is an important part of the renal urinary, that is, the glomerulus. Filtration.
- Chinese name
- Renal cortex
- Foreign name
- renal cortex
- Department
- Nephrology
- After the frontal section of the kidney, the dark part of the outer layer is called the renal cortex. The cortex surrounds the medulla and is rich in blood vessels. It is granular in appearance and is mainly composed of renal corpuscles and tubules. The cortex has a renal column that extends to the medulla, and the base of the vertebral body of the medulla is facing the cortex. The entire renal parenchyma is composed of many renal tubules, blood vessels, and connective tissue. The renal cortex is an important part of the renal urinary, that is, the glomerulus. Filtration.
Renal cortex I. Overview:
- The renal parenchyma is divided into two parts, the cortex and the medulla. The renal cortex is located in the superficial layer of the kidney and is mainly composed of renal corpuscles and tubules. The renal corpuscle is the main structure that forms the original urine. It is approximately spherical with a diameter of about 200 m. The central part is a glomerulus composed of capillaries. The renal corpuscle has two poles, one side is the vascular pole in and out of the renal corpuscle, and the opposite side is the urinary pole connected to the renal tubule. The cortex has a renal column that extends to the medulla. The thickness of the cortex is 1 cm, which accounts for 1/3 of the parenchyma of the kidney. It contains rich blood vessels and is reddish-brown. The renal cortex is an important part of the kidney urinary.
- Adults' kidney cortex forms a continuous brilliance outer area with some protruding renal columns extending to the renal pyramid. It includes renal corpuscles and renal sacs but does not include the loop of Henle portion of the renal medulla. It also includes vascular sections and ureters.
Renal cortex , glomeruli
- The glomerulus, also called the glomerulus, is the starting end of the nephron. It is swollen like a sphere, with a diameter of 150-250 m and an area of 0.1010-0.4670 mm2. There are two poles: the vascular pole and the urinary pole. The blood vessels have the arteriolar arterioles into which the blood flows and the arteriolar arteries that lead out of the blood. The arterioles are usually larger in diameter than the efferent arterioles. The globular arterioles penetrate into the renal sac and are divided into 4 to 5 branches. Each branch forms a capillary. There is a small amount of matrix between the capillaries as the mesangium and a small number of mesangial cells. The opposite end is called the urinary pole where it is connected to the renal tubule.
- A component of the nephron. It is located in the renal cortex and the renal column, and is composed of a blood vessel and a glomerulus. Globules are branches of renal arteries, that is, capillaries formed by entering the arterioles into the glomerulus and branching and curling again and again. The capillaries of this bulb finally merged into an output arteriole and emerged from the glomerulus. The caliber of the input arterioles is thicker than the caliber of the output arterioles. Therefore, more blood enters the globules and less effluxes, resulting in an increase in the internal pressure of the spheres, which has a great effect on the filtration of the vascular bulbs.
Renal cortex III, renal tubules
- The renal tubule is a part of the nephron. It is a slender single-layer epithelial duct, about 50mm long and 20-50 m wide. The upper end is immediately adjacent to the end of the glomerulus as a collecting tube. The outer surface has a continuous basement membrane and renal tubules. Of epithelial cells rest on it. Smith proposed a more reasonable segmentation method based on the function and structure of the renal tubules. The total length of the renal tubules was divided into four sections: proximal, slender, distal, and collecting duct. This subdivision goes beyond the embryonic intrinsic nephron division because the collecting duct comes from the ureter-ic bud and does not belong to the intrinsic nephron. However, the distal end of the renal tubule and the collecting duct have many similarities in structure. The functional collecting duct is related to the composition of urine. Therefore, the collecting duct should not be viewed only as a catheter of urine, but should be composed of renal tubules. section. If the total length of all renal tubules of the two kidneys can reach 70 to 100 km, and the total area of the tubules can reach 6 m2, which is 3 to 4 times the total surface area of the human body, it has been estimated that the total area of the proximal tubules of the two kidneys is 50 ~ 60m2, which greatly increases the area of renal tubular reabsorption.